"When Kavita Shukla visited her grandmother in India while still in middle school, she accidentally brushed her teeth with tap water. Her grandmother concocted a 'murky brown spiced tea' for her to drink—and Shukla never got sick. Back home in Maryland, Shukla discovered that the spices in the tea inhibited bacterial growth. 'I dipped some strawberries in the mixture,' she recalls, 'and they stayed fresh for days.'"

"Shukla, now 28, turned her grandma's home remedy into FreshPaper, a small biodegradable sheet that, when placed in a crisper or fruit bowl, keeps produce fresh two to four times longer than normal. Over the next year, she's partnering with nonprofits in developing countries to ship FreshPaper to some of the roughly 1.2 billion people in the world who lack refrigeration, including small-scale farmers in India and Africa who sometimes can't sell their crop before it spoils."

- Oprah Magazine's WOW List